fbdev/ps3fb: fix compile warning

Commit 11bd5933abe0 ("fbdev/ps3fb: use vm_iomap_memory()") introduced
the following warning:

drivers/video/ps3fb.c: In function 'ps3fb_mmap':
drivers/video/ps3fb.c:712:2: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]

Fix this by adding the parentheses.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
cgroup: initialize xattr before calling d_instantiate()

cgroup_create_file() calls d_instantiate(), which may decide to look
at the xattrs on the file. Smack always does this and SELinux can be
configured to do so.

But cgroup_add_file() didn't initialize xattrs before calling
cgroup_create_file(), which finally leads to dereferencing NULL
dentry->d_fsdata.

This bug has been there since cgroup xattr was introduced.

Cc: <stable@vger.kernel.org> # 3.8.x
Reported-by: Ivan Bulatovic <combuster@archlinux.us>
Reported-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
libata: update "Maintained by:" tags

Jeff moved on to a greener pasture.

 s/Maintained by: Jeff Garzik/Maintained by: Tejun Heo/g

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jeff Garzik <jgarzik@pobox.com>
ata_piix: add PCI IDs for Intel BayTail

Adds IDE-mode SATA Device IDs for the Intel BayTrail platform.

Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
target: Remove unused wait_for_tasks bit in target_wait_for_sess_cmds

Drop unused transport_wait_for_tasks() check in target_wait_for_sess_cmds
shutdown code, and convert tcm_qla2xxx + ib_srpt fabric drivers.

Cc: Joern Engel <joern@logfs.org>
Cc: Roland Dreier <roland@kernel.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
libata: make ata_exec_internal_sg honor DMADIR

libata honors DMADIR for regular commands, but not for internal commands
used (among other) during device initialisation.

This makes SATA-host-to-PATA-device bridges based on Silicon Image SiL3611
(such as "Abit Serillel 2") end up disabled when used with an ATAPI device
after a few tries.

Log output of the bridge being hot-plugged with an ATAPI drive:

  [ 9631.212901] ata1: exception Emask 0x10 SAct 0x0 SErr 0x40c0000 action 0xe frozen
  [ 9631.212913] ata1: irq_stat 0x00000040, connection status changed
  [ 9631.212923] ata1: SError: { CommWake 10B8B DevExch }
  [ 9631.212939] ata1: hard resetting link
  [ 9632.104962] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
  [ 9632.106393] ata1.00: ATAPI: PIONEER DVD-RW  DVR-115, 1.06, max UDMA/33
  [ 9632.106407] ata1.00: applying bridge limits
  [ 9632.108151] ata1.00: configured for UDMA/33
  [ 9637.105303] ata1.00: qc timeout (cmd 0xa0)
  [ 9637.105324] ata1.00: failed to clear UNIT ATTENTION (err_mask=0x5)
  [ 9637.105335] ata1: hard resetting link
  [ 9638.044599] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
  [ 9638.047878] ata1.00: configured for UDMA/33
  [ 9643.044933] ata1.00: qc timeout (cmd 0xa0)
  [ 9643.044953] ata1.00: failed to clear UNIT ATTENTION (err_mask=0x5)
  [ 9643.044963] ata1: limiting SATA link speed to 1.5 Gbps
  [ 9643.044971] ata1.00: limiting speed to UDMA/33:PIO3
  [ 9643.044979] ata1: hard resetting link
  [ 9643.984225] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
  [ 9643.987471] ata1.00: configured for UDMA/33
  [ 9648.984591] ata1.00: qc timeout (cmd 0xa0)
  [ 9648.984612] ata1.00: failed to clear UNIT ATTENTION (err_mask=0x5)
  [ 9648.984619] ata1.00: disabled
  [ 9649.000593] ata1: hard resetting link
  [ 9649.939902] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
  [ 9649.955864] ata1: EH complete

With this patch, the drive enumerates correctly when libata is loaded with
atapi_dmadir=1:

  [ 9891.810863] ata1: exception Emask 0x10 SAct 0x0 SErr 0x40c0000 action 0xe frozen
  [ 9891.810874] ata1: irq_stat 0x00000040, connection status changed
  [ 9891.810884] ata1: SError: { CommWake 10B8B DevExch }
  [ 9891.810900] ata1: hard resetting link
  [ 9892.762105] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
  [ 9892.763544] ata1.00: ATAPI: PIONEER DVD-RW  DVR-115, 1.06, max UDMA/33, DMADIR
  [ 9892.763558] ata1.00: applying bridge limits
  [ 9892.765393] ata1.00: configured for UDMA/33
  [ 9892.786063] ata1: EH complete
  [ 9892.792062] scsi 0:0:0:0: CD-ROM            PIONEER  DVD-RW  DVR-115  1.06 PQ: 0 ANSI: 5
  [ 9892.798455] sr2: scsi3-mmc drive: 12x/12x writer dvd-ram cd/rw xa/form2 cdda tray
  [ 9892.798837] sr 0:0:0:0: Attached scsi CD-ROM sr2
  [ 9892.799109] sr 0:0:0:0: Attached scsi generic sg6 type 5

Based on a patch by Csaba Halász <csaba.halasz@gmail.com> on linux-ide:
http://marc.info/?l=linux-ide&m=136121147832295&w=2

tj: minor formatting changes.

Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
sata_rcar: clear STOP bit in bmdma_start() method

Iff bmdma_setup() has to stop a DMA transfer before starting a new
one, then the STOP bit in the ATAPI_CONTROL1 register will remain set
(it's only cleared when setting the START bit to 1) and then
bmdma_start() method will set both START and STOP bits simultaneously
which should abort the transfer being just started.  Avoid that by
explicitly clearing the STOP bit in bmdma_start() method (in this case
it will be ignored on write).

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
s390/dma: do not call debug_dma after free

In dma_free_coherent call debug_dma_free_coherent before deallocating
the memory to avoid a possible use after free.

Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
kernel: Fix s390 absolute memory access for /dev/mem

On s390 the prefix page and absolute zero pages are not correctly
returned when reading /dev/mem. The reason is that the s390 asm/io.h
file includes the asm-generic/io.h file which then defines
xlate_dev_mem_ptr() and therefore overwrites the s390 specific
version that does the correct swap operation for prefix and absolute
zero pages. The problem is a regression that was introduced with git
commit cd248341 (s390/pci: base support).

To fix the problem add "#ifndef xlate_dev_mem_ptr" in asm-generic/io.h
and "#define xlate_dev_mem_ptr" in asm/io.h. This ensures that the
s390 version is used. For completeness also add the "#ifndef"
construct for xlate_dev_kmem_ptr().

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
OMAPDSS: Fix crash with DT boot

When booting with DT, there's a crash when omapfb is probed. This is
caused by the fact that omapdss+DT is not yet supported, and thus
omapdss is not probed at all. On the other hand, omapfb is always
probed. When omapfb tries to use omapdss, there's a NULL pointer
dereference crash. The same error should most likely happen with omapdrm
and omap_vout also.

To fix this, add an "initialized" state to omapdss. When omapdss has
been probed, it's marked as initialized. omapfb, omapdrm and omap_vout
check this state when they are probed to see that omapdss is actually
there.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
cgroup: fix a subtle bug in descendant pre-order walk

When cgroup_next_descendant_pre() initiates a walk, it checks whether
the subtree root doesn't have any children and if not returns NULL.
Later code assumes that the subtree isn't empty.  This is broken
because the subtree may become empty inbetween, which can lead to the
traversal escaping the subtree by walking to the sibling of the
subtree root.

There's no reason to have the early exit path.  Remove it along with
the later assumption that the subtree isn't empty.  This simplifies
the code a bit and fixes the subtle bug.

While at it, fix the comment of cgroup_for_each_descendant_pre() which
was incorrectly referring to ->css_offline() instead of
->css_online().

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: stable@vger.kernel.org
arm64: kernel: compiling issue, need 'EXPORT_SYMBOL(clear_page)'

Need 'EXPORT_SYMBOL(clear_page)' if building with allmodconfig.

The related errors:
  ERROR: "clear_page" [fs/ocfs2/dlm/ocfs2_dlm.ko] undefined!
  ERROR: "clear_page" [fs/ntfs/ntfs.ko] undefined!
  ERROR: "clear_page" [fs/gfs2/gfs2.ko] undefined!
  ERROR: "clear_page" [fs/fuse/fuse.ko] undefined!
  ERROR: "clear_page" [fs/ext3/ext3.ko] undefined!
  ERROR: "clear_page" [fs/ext2/ext2.ko] undefined!
  ERROR: "clear_page" [fs/exofs/libore.ko] undefined!
  ERROR: "clear_page" [fs/exofs/exofs.ko] undefined!
  ERROR: "clear_page" [drivers/block/brd.ko] undefined!

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: Do not report user faults for handled signals

Currently user faults (page, undefined instruction) are always reported
even though the user may have a signal handler for them. This patch adds
unhandled_signal() check together with printk_ratelimit() for these
cases.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
s390/smp: lost IPIs on cpu hotplug

IPIs might be lost when a cpu gets brought offline:

When stop_machine executes its state machine there is a race window
for the state STOPMACHINE_DISABLE_IRQ where the to be brought offline
cpu might already have irqs disabled but a different cpu still may
have irqs enabled.
If the enabled cpu receives an interrupt and as a result sends an IPI
to the to be offlined cpu in its bottom halve context, the IPI won't
be noticed before the cpu is offline.

In fact the race window is much larger since there is no guarantee
when an IPI will be received.

To fix this check for enqueued but not yet received IPIs in the
cpu_disable() path and call the respective handlers before the cpu
is marked offline.

Reported-by: Juergen Doelle <juergen.doelle@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch: s390: appldata: using strncpy() and strnlen() instead of sprintf()

'buf[2]' is 2 bytes length, and sprintf() will append '\0' at the end
of string "?\n", so original implementation is memory overflow.

Need use strncpy() and strnlen() instead of sprintf().

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
s390/pgtable: Fix check for pgste/storage key handling

pte_present might return true on PAGE_TYPE_NONE, even if
the invalid bit is on. Modify the existing check of the
pgste functions to avoid crashes.

[ Martin Schwidefsky: added ptep_modify_prot_[start|commit] bits ]

Reported-by: Martin Schwidefky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
CC: stable@vger.kernel.org
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
cgroup: warn about mismatching options of a new mount of an existing hierarchy

With the new __DEVEL__sane_behavior mount option was introduced,
if the root cgroup is alive with no xattr function, to mount a
new cgroup with xattr will be rejected in terms of design which
just fine.  However, if the root cgroup does not mounted with
__DEVEL__sane_hehavior, to create a new cgroup with xattr option
will succeed although after that the EA function does not works
as expected but will get ENOTSUPP for setting up attributes under
either cgroup. e.g.

setfattr: /cgroup2/test: Operation not supported

Instead of keeping silence in this case, it's better to drop a log
entry in warning level.  That would be helpful to understand the
reason behind the scene from the user's perspective, and this is
essentially an improvement does not break the backward compatibilities.

With this fix, above mount attemption will keep up works as usual but
the following line cound be found at the system log:

[ ...] cgroup: new mount options do not match the existing superblock

tj: minor formatting / message updates.

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Reported-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
ahci: add an observed PCI ID for Marvell 88se9172 SATA controller

A third possible PCI ID, as personally observed, and found in the
pci.ids list.

Signed-off-by: George Spelvin <linux@horizon.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Merge branch 'fbdev-3.10-fixes' of git://gitorious.org/linux-omap-dss2/linux into linux-fbdev/for-3.10-fixes

Pull Tomi fixes for ps3fb and omap2

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
clk: ux500: Provide device enumeration number suffix for SMSC911x

First Ethernet device has a ".0" appended onto the device name. It
appears that we need this in order to obtain the correct clock.

Without this fix Ethernet does not function on Ux500 devices, which is a
regression.

Cc: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: improved changelog]